Gaoya dianqi随着500 kV主网不断扩容，局部区域出现短路容量超标问题，在线路中串入由快速开关和限流电抗器并联组成的故障限流器是解决短路容量超标的有效手段，有必要研制一种应用于500 kV故障限流器的快速开关。快速开关采用罐式、多断口串联结构，依托电磁斥力机构实现断口快速分合闸；开展了斥力机构、屏蔽结构、均压、温升的仿真设计；通过单断口机械寿命、对地绝缘、端间绝缘、温升等试验，对设计进行了验证。结果表明：斥力机构方面，真空灭弧室触头分闸时间小于1 ms，最大分闸速度为7.6 m/s，连接杆上最大受力为120 kN ...
王开白 +5 more
doaj
[Polydimethylsiloxane microfluidic aptasensor： opening a new era of biomarker point-of-care testing]. [PDF]
Se PuYang Y +5 more
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[Advances in the clinical management of acute severe ulcerative colitis]. [PDF]
Zhejiang Da Xue Xue Bao Yi Xue BanShao W, Zhou Y, Xu F.
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[Geriatric hip fracture and enhanced recovery after surgery: current status and future perspectives]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiXie T, Tian C, Rui Y.
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[Study on electrospun film-covered tracheal stents with adaptive release of anti-inflammatory drugs driven by the piezoelectric effect]. [PDF]
Sheng Wu Yi Xue Gong Cheng Xue Za ZhiWang Z +6 more
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[Open-ended experiment： microextraction and smartphone-assisted colorimetric quantification of sulfur dioxide]. [PDF]
Se PuZhang L +5 more
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[Determination of 13 prohibited alkaloids in essential oil-based cosmetics by ultra performance liquid chromatography-tandem mass spectrometry combining QuEChERS purification]. [PDF]
Se PuLiu Z +6 more
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Gaoya dianqi随着快速开关技术在交直流电网中应用的多样化，电磁斥力机构作为其核心组件，近年来也被各大科研机构广泛研究。“双碳”目标下，输电等级快速开关对工程化应用的电磁斥力机构提出了更大的挑战。文中首先介绍了电磁斥力机构的基本原理，结合理论分析和模型仿真得出影响出力效率及运动速度的关键因素，然后提出了分合闸线圈盘的优化设计方案，采用常规硅钢片材料设计线圈盘。再通过有限元仿真，确定了分合闸线圈盘尺寸参数。最后通过一套10 kV快速开关样机，实测对比了不同线圈盘方案下，电磁斥力机构的出力特性，证明了前期模型的准确性 ...
许元震 +6 more
doaj
[Discussion on the application of clear aligner treatment in multidisciplinary complex cases]. [PDF]
Hua Xi Kou Qiang Yi Xue Za ZhiLai W.
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[Research progress on the role and mechanism of magnesium element and magnesium materials in tendon-bone interface healing]. [PDF]
Zhongguo Xiu Fu Chong Jian Wai Ke Za ZhiYue H +6 more
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